Pitch-adjuster for drag-line excavator-buckets.



. I916. I I

Patented May 16,1916. 2 S'HEETSSHEET 1- J. J.- MiTCHELL.

PITCHADJUSTER FOR DRAG LINE EXCAVATOR BUCKETS. APPLICATION FILED JAN. 4. 1916.

Patentd May 16, 1916.

2 SHEETS-SHEET 2.

mum H 1|! [In 1 burrs s'rATEs A JESSE J. ml'rcnnrrgor' PARKERSBURG, wrzsv'r v aenvm.

IEITGI-LADJUSTER vFOR DRAG-LINE EXGAVATOR BUCKETS.

ers for Drag-Line Excavator-Buckets,

which the following is a specification.

The invention relates to dragline excavator buckets, and more particularly to the class of pitch adjusters for drag line excavator buckets.

The primary object of the invention is the provision of a bucket of this character wherein the same can be readily adjusted to vary the pitch thereof so as to permit deep and shallow digging and also for the quick loading of the bucket.

Another object of the invention is the provision of a pitch adjuster of this character wherein the construction thereof permits the same to be mounted upon or removed from the bucket and when on the bucket will adjust the same so as to vary the angular disposition of the bucket when being dragged for excavating purposes.

Afurther object of the invention is the provision of a pitch adjuster ofthis character which is novel in construction to assure the proper angular disposition of the bucket when being dragged and permits the quick and convenient adjustment of the bucket to vary the pitch thereof as the occasion may require.

A still further object of the invention is the provision of a pitch adjuster of this character which is extremely simple in construction, thoroughly reliable and eflicient in operation, strong, durable and inexpensive to manufacture.

Other objects will be in part obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction here-' inafter set forth, and the scope of the application of which will be indicated in the claims hereunto appended.

In the accompanying drawings: Figure 1 is a side elevation'of a drag bucket showing the adjuster constructed in accordance with the invention applied thereto; Fig. 2 is a rear elevation; Fig. 3 is a front elevation; Fig. 4 is a vertical longitudinal sectional view; Fig. 5 is a transverse sectional Specificationof Letters Patent. P t t M y1 1.91 Application filed January 4, 1916. Serial IiT o. 70,089. i i i i view on the line 5+5 a Fig.1; and Fig. 6 lsa bottom plan View.

responding parts throughout the, several views of the drawings. I w

Referring to the drawings indetail, A

designates generally a drag bucket which is of the ordinary well known construction,

having at its front end the cutting edge B, while on the rear end are mounted spaced parallel angle eyes '5 having a series of holes 6 for receiving adjustable pins 7 for a purpose hereinafter fully described. Secured to opposite sides of the bucket A are bearing [ears 8 supporting a pivot rod 9 for swingingly connecting to the body of the bucket A the arms 10'which are extended rearwardly 1 of the bucket beneath the bottom thereof and are formed with upwardly curved rear ends 11 which work between the parallel angle eyes 5 and haveholes 12 adapted to register with the holes 6 for receiving the adjustable pins 7, thereby locking the arms in adjusted positionrelative to the body of the bucket A for varying the pitch of the latter when dragged by the excavator or machine. Fixed to the arms 10 substantially the length thereof is a plate 13 which is bent in accordance with the contour of the arms 10 and is formed at its forward end with an upstanding upwardly curved lip or flange 1A which serves to prevent the dirt cut by the edge B from working rearwardly be- 1 tween the plate 13 and the bottom of the body of the bucket, while the rear end portion of the said plate '13 will prevent the dirt entering between the latter and the bottom of the bucket when said bucket is dragged backwardly. The plate 13 is adapted to rise over the ground while the arms 10 serve to hold the body'of the bucket A at the desired angular pitch for deep or shallow digging and also to aid in the quick loading of the bucket.

From the foregoing description, taken in connection with the accompanying drawings, the construction and manner of operation will be readily apparent and-a more extended explanation of the invention has,

therefore, been omitted.

Having thus described my invention, I claim:

1. The combinationgwith a drag bucket, of a pair of arms pivotally connected to the forward end portion of the bucket and having upstanding rear ends, guides on the rear ATENTOFFICE.

Similar reference characters indicate 001- I ends of the bucket and between which work the upstanding rear ends of the arms, means passed through the guides and upstanding ends to adjustably connect the arms to the bucket, and a plate secured to the arms and co-extensive in length therewith.

, 2. The combination with a drag bucket, of a pair of arms pivotally connected to the forward end portion of the bucket and having upstanding rear ends, guides on the rear ends of the bucket and between which work the'upstanding rear ends of the arms, means passed through the guides and upstanding ends to adjustably connect the arms to the bucket, a plate secured to the arms and coextensive in length therewith, and an upstanding lip formed at the front end of the a JESSE J. MITCHELL.

' Witnesses:

CLARA B. OLIVER, JAMES BOOTH.

Copies of this patent be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0. 

